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# Exam2.1 - Problem 3 One Kh/s of R134-a is compressed in an...

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ENME 320 Name: Exam II Problem 1 Air is used in a carnot cycle with an efficiency of 65% and a low temperature of 300K. During the heat rejection process the pressure changes from 90 Kpa to 200 Kpa. Determine: a. Q H b. The work for every process in the cycle.

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Problem 2 P2= 1Mpa HE P3= P2 T1= 300K T4=700 K P1= 100 Kpa P4= 100KPa AIR The compressor efficiency is 80%. The power output from the turbine is 1.5 times the power input to the compressor. Determine: a. The exit temperature of the compressor. b. The inlet temperature of the turbine c. The entropy change across the heat exchanger, in KJ/Kg.K

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Unformatted text preview: Problem 3 One Kh/s of R134-a is compressed in an adiabatic compressor from 100 Kpa, sat. vapor to 1.4 MPa. The power input to the compressor is 121.24 KW. Determine: a. The compressor exit temperature b. The compressor efficiency Problem 4 Steam Pa= 1 Mpa Pb= Pa Sat. vap. Sat Liq. a b Air P1= 500 Kpa T1= 300 K P2= P1 P3= 100 KPa m= 0.2 Kg/s T2 = 800K T3= 277C Determine a. The mass flow rate of steam b. The turbine efficiency, the turbine is insulated. c. The entropy production in the turbine...
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Exam2.1 - Problem 3 One Kh/s of R134-a is compressed in an...

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